Shiner also said although he has met with his client several times in jail, she hasn’t been able to tell him what happened that night.

“She might not remember,” he said.

Police said they found the toddler dead in the bathtub and said her brother told them Lucas gave them both some type of pill which made him dizzy. He woke up in bed with Lucas next to him. Police said the boy discovered her sister dead in the bathtub and tried futilely to revive her.

Lucas and her partner of 20 years, Jacqueline Jamason had recently split up, and Lucas left a bitter suicide note on her computer telling Jamason "In your words, when you are laying in bed at night remember you (expletive) did this to yourself."

Lucas was a licensed mental health counselor, as is Jamason.

Jamason has hired criminal attorney James Eisenberg to follow the case and shield her from the media, he told WPBF.

"She’s devastated," Eisenberg said. "She never saw this coming, she had no reason to believe Lucas would hurt the children. It came out of nowhere."

Shiner said Lucas’ parents had just arrived from Virginia before the murder to take their daughter and both children back with them for the summer.

“They’ve gone home now, without any of them,” he said.

ALSO: Have You Seen Death Row's Female Faces?

Have You Seen Death Row's Female Faces?

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Female faces of death row

There are currently 53 women on death row across the country. From oldest to youngest, see the female faces of death row.

SUSPECT'S LAWYER just told our terri parker in an exclusive interview that his client HAS A LONG HISTORY OF MENTAL ILLNESS... TERRI ? 3 I'VE JUST LEARNED DEFENDANT KYMBERLY LUCAS' LAWYER... CLAIMS SHE'S BEEN MENTALLY ILL FOR MUCH OF HER LIFE....AND WAS ON SEVERAL DIFFERENT POWERFUL DRUGS AT THE TIME SHE ALLEGEDLY MURDERED THAT TODDLER AND TRIED TO KILL THE CHILD'S BROTHER LUCAS IS CHARGED WITH KILLING HER EX- PARTNER JACQUELINE JAMASON'S TWO YEAR OLD DAUGHTER ELLIANA....AND TRYING TO KILL ILLEANA'S TEN YEAR OLD BROTHER. HER LAWYER MARC SHINER SAYS SHE MAY NOT REMEMBER WHAT HAPPENED THAT NIGHT....HE SAYS LUCAS HAS HAD A LONG HISTORY OF MENTAL ILLNESS....AND HE NOW HAS DOCTORS TRYING TO DETERMINE EXACTLY WHAT MEDICATIONS SHE WAS TAKING AT THE TIME OF THE MURDER...BUT SAYS ITS A LAUNDRY LIST INCLUDING SOME DRUGS HE HAS NEVER HEARD OF. SHINER ALSO SAYS LUCAS SUFFERED A RECENT HEAD INJURY THAT MAY HAVE CAUSED HER TO ACT ABNORMALLY. THE CHILDREN'S MOTHER JAMASON HAS ALSO HIRED AN ATTORNEY...WHO TELLS ME SHE HAD NO CLUE HER EX-PARTNER WAS POTENTIALLY DANGEROUS TO THE CHILDREN, AND THAT SHE HAD AGREED TO LET LUCAS SEE THEM AND NEVER EXPECTED SHE'D HURT THEM....THE TWO WOMEN HAD RAISED THE CHILDREN TOGETHER. SHINER SAYS LUCAS IS DEVASTATED AND WHILE HE HAS VISITED HER NUMEROUS TIMES IN JAIL SHE HAS BEEN UNABLE TO TELL HIM WHAT HAPPENED THE NIGHT THE TEN YEAR OLD WOKE UP FROM ALLEGEDLY BEING DRUGGED AND FOUND HIS TWO YEAR OLD SISTER DEAD IN THE BATHTUB. 3